Padlock



L. SNYDER.

PADLOCK.

APPLICATION men MAY 28, 1920.

1,367,104. mm Feb. 1,1921.

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STATES PATENT OFFICE.

PADLOCK.

Specification. of Letters Patent.

Patented Feb. 1, 1921.

Application filed May 28, 1920. Serial No. 384,823.

To all whom it may concern Be it known that l, lio'ors hlnrons, cititen of the United tiltates, residing at Philadelphia, in the county of Philadelphia and fitate r Pennsylvania, have invented a new and useful improvement in Padlocks, of which the following is a specification.

This invention relates to padloclrs of the class shown in Patent No. 1,209,8-%t, granted to me December 26, 1916. In such padlochs the hasps are unlocked and allowed to spring open by the mere inward thrust of a hey having the proper outline.

The object of the invention is to simplify and cheapen. the manufacture and assembly, and at the same time render more secure, padloclcs of the class shown in my prior patent.

in the accompanying drawings Figure 1 shows a side View of a padlock that embodies the invention. Fig. 2 shows an edge view of the same. big. 3 is a section through the casing showing the parts in lochedposition and the key before it is inserted. Fig. l; is a similar section with the parts in unlocked position. Fig. 5 shows a side view of the locking mechanism removed from the casing. Fig. 6 shows a top view of the locking mechanism. Fig. 7 shows an end view of the locking mechanism.

The casing 1 ol the padlock is cast to the desired shape in a single piece of any suitable metal, as iron, brass or bronze, with hasp openings 2 and 3 in one end and a key hole a of suitable outline in one side near the other end. ln making the casing the chamber and the hasp openings are produced by cores placed in the mold and it is desirable to insert the key 5 in the mold. and cast the metal about it so as to form a key hole which conforms to the shape of the hey to be used. with the particular loch, thus obviating the necessity of performing any machining operations on the casing. 1

T he hasp 6 which can be cast to shape is pivotally held in the opening 2 by a pin 7 which is driven through and headed on both ends flush with the sides of the casing, and the swinging end of the hasp is adapted to be turned into and out of the opening 3. The end of the hasp in the interior of the casing curves downward from the pivot pin toward the bottom of the chamber and is provided with an angular notch 8. A spring 9 which is coiled about a stud 10 cast on the side of the beep and is arranged to press against the side wall of the casing, tends to throw the hasp open.

'l: he locking member comprises a bolt 11 WhlCll is pivoted to a block 12 and has its free end thrown up by spring 13 into the notch formed in the inner end of the beep, this spring being coiled about a stud 14: cast on the side of the bloclr to which the bolt is pivoted. The bolt has a downwardly extending foot 15, the upper face of which is desirably formed on an angle oi approximately thirty degrees to the end of the foot. becured to one side out the block near the pivot end is a leaf spring 16, and on the free end of this spring is a guard plate 17 which is adapted to be held by the spring with its edge extending into a notch 18 on the block in front of the free end oi the locking bolt. Projecting forwardly from the guard plate is a thin pointed finger 19. In front of the guard plate the side face of the block is out out to conform to the outline of the key and along the top of the block in front of the guard plate is a protecting rib 20; The block which supports these locking and protectiug parts is approximately as long as the width of the opening in the interior of the casing.

In assembling the structure the block bearing the locking bolt, guard plate and lifting finger is dropped into the casing through the opening 2 betore the hasp is inserted. Then the end of the block near the key opening is secured in place by means of a screw 20 (shown in dotted lines in Fig. 5) that after it is screwed in from the outside of the casing is cut oil' flush with the face of the casin The other end of the block which carries the locking parts merely butts against the edge wall above the bottom of the casing. After the locking parts have been fastened in place the hasp is located in position and the pivot pin driven through and headed flush with the casin When the hasp is turned down to locking position its inner end is engaged by the free end of the locking bolt which is thrown by its spring up into the notch in the end of the hasp. \Vith the parts in this position L the hasp cannot be opened, for any tendency to swing it open is resisted by the locking bolt which extends between the inner end of the hasp and the side wall of the casing lengthwise in the nth of movement of the end of the beep. '10 open the lock a key having the proper grooves milled in its side to fit the key slot in the edge of the casing and the grooves in the end of the lock hold.- ing block and provided with an angular front end is thrust into the keyhole. The first action of the key is to engage the finger and to raise the guard plate out of the path.- of the end of the key. As the inward movement of the key continues its inclined end engages the inclined upper face of the foot that projects from the locking bolt and draws the free end of the locking bolt downward out of engagement with the notched end of the hasp, which when freed is thrown open by its spring. As the hasp is thrown open and the key removed the free end of the locking bolt is thrown up against the lower end and holds the hasp open until it is swung to closing position and the looking bolt again engaged with the notched inner end. Only a key of the proper outline can be insertedinto this padlock, and the guard plate cannot be lifted from in front of the shoe on the end of the locking bolt except by the insertion of the proper key.

A small wire or pin will not engage the finger so as to lift the guard plate and nothing can pass the guard plate until it is lifted. This padlock requires practically no machining operations inits manufacture,

the parts being mostly cast to final shape.

It is easy to assemble, and when assembled and finished it is practically impossible to see how it was put together, for the casing, is in one pieceand there is apparently no opening, after the hasp is in place, for the locking parts to be inserted, and no way is known of picking it. Maximum strength is insured as a result of the construction, and particularly for the reason that any attempt to swing the hasp open is resisted by the thrust "of the inner end of the hasp in a direct lin'e of the entire length of the locking bolt which is backed up by the side wall of the casing.

The invention claimed is 1. A padlock having a casing provided with a keyhole in its edge andtwo hasp openings in its end, a hasp pivotally held in one of "said openings and adapted to be swung into and'out ofthe other of said openings, a spring tending to throw the hasp open, a block dropped into the bottom of the casing and extending from side to side, a locking bolt pivotally attached to one end of said block, a spring adapted to throw the free end of the *bolt up into engagement with the inner end of the hasp, a foot extending from the free end offthe locking bolt into line with the key opening, a guard plate normally held by a spring between said foot and key opening, and a linger projecting from the guard plate toward the key opening.

:2. A padlock comprising a casing having a keyhole in one side and two hasp openings in its end, a hasp pivotally held in one of said openings and adapted to be swung into and out of the other of said openings, the inner end of said hasp having a locking notch and bearing a spring adapted to engage the side wall of the casing and throw the hasp open, a block located in the bottom of the casing, said block carrying a locking belt, a spring adapted to thrust the end of the locking bolt into engagement with the notch in the inner end the hasp, a foot projecting from the locking bolt into line with the key hole, a spring-pressed guard plate normally extending between said foot and the key hole, a linger project ing from (l e guard plate toward the key hole, and a protecting rib extending from the edge of said block parallel with the key path.

3. A padlock comprising a casing with a key hole in one side and two hasp openings in one end, a hasp pivolally held in one of said openings and having its outer end adapted to swing into and out of the other openings, a spring adapted to throw the hasp open, a locking bolt normally extending lengthwise between the inner end oi the hasp and the side wall of the casing, a pivot for loosely retaining one end of the locking bolt, a spring for thrusting the other end ol the locking bolt into engagement with the inner end of the hasp, a foot with an angular upper face extending from the free end of the locking bolt into line with the kev opening, and means normally extending in front of said foot and adapted-to be raised by the insertion of a key before the key can engage said foot for drawing the bolt down out of engagement with the inner on d of the hasp.

4. A padlock having a casing with two hasp holes in one end and a key hole in one side, a hasp pivotally held in one opening and adapted to swing into and out ol the other opening, said hasp having a locking notch in the interior of the casing, a block located in the bottom of the casing, a bolt pivotally attached to the block and extending between the side wall of the casing and notch in the hasp, and means for withdrawing the end of the bolt from the notch in the hasp.

LOUIS SNYDER. 

